Elon Musk unveils 'kid-size' submarine for Thai cave rescue

The world is captivated by the plight of a Thai soccer team trapped in a flooded cave -and so, too, is billionaire inventorElon Musk
As rescuers began a daring extraction of the boys and their coach from the cave over the weekend, Musk said he had sent a "child-size submarine" to the country to assist in the massive rescue effort.
"Hopefully useful," he wrote in one tweet, noting that the device would arrive in 17 hours. "If not, perhaps it will be in a future situation."
Hours later, Musk share